V4L/DVB (10413): Bug fix: Restore HVR-4000 tuning.

Some cards uses cx24116 LNB_DC pin for LNB power control,
some not uses, some uses it different way, like HVR-4000.

Tested-by : Edgar Hucek <gimli@dark-green.com>

Signed-off-by: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>